Definitions:

1. By the year or every year. adverb
   • A dairy cow needs to produce a calf each year.
   • Millions of dollars are spent each year on beauty products.
2. Without missing a year. adverb
   • Each year the ducks fly south.

Synonyms:

• annually
• by the year
• every year
• once a year
• per annum
• per year
• year after year